National Republican., 1887-12-24
WAsnMeroN. Dec. 25, 1851.
PURE WATER.
HRy"

w
The following is the Official report of the
superintendent and engineers OF the water
works of Atlanta, Ga, dated Nov. 30, 1887:
HonOrali ie Board Water Commissioners:
GFNTLPMEN: According to a resolution ad-
opted by your honorable body at the last meet.
Ing have made thorough aud complete test
of the filters as 10 their capacity. The builders
guarantee is lhatthey thc Twelve altersl shall
Mt Clayton, city engineer; Mr.. Haynes, assis-
tant city engineer. and myself, in behalf of the
city, and Nj, g. II. Kendrick, in behalf OF the
Newark flltertng Company, conducted the
test. Mr.. Travis the engineer In charge OF the
pumping stht ion, gave his personal attention
10 the 81 Grafton OF the engine and pumps. The
large itOOt 90 gallonl engine was run through
the whole test, (Jhe small 2,OO0OoO gallon
engine Is usually put In service after the heavy
cop.ump,ion OF the day Is over and run through
Mr.. Cioy,on and myself decided that run
oftwelve hours, requiring that during the
time Fix Of The twelve filters should be thor.
cient Test. The tcsi was started at 1880 a. m.
and closed at i0IG p. m. The water being de.
liveIed BY the pumps was estimated from the
| as the quantity being Uttered Readings were
taken from the engine counter and the height
Of water In the clear water basin at the expira.
capacity OF each pumping cylinder at a revo..
luiion Of the eneine (dcducting the cubical
| displacement of the rod from the up stroke) is
| pumps 1O4 go 1000 gallons At each revolution.
in figuring the duty the friction is left out as
compensation for loss In actual pumpage,
plunge piunger and and close Sss OF valves The pumps were
In good condition. and the per cent. OF loss al
| lowed may or may not be sufficient. This
| would be hard 10 determine accurately, but as
the head Of 300 feet on the pumps give 1850
| pounds pressure the valves close very quickly,
| and, therefore, the percentage OF loss at this
point is small. The clearwater basin holds
l n
| twenty.ioot mark-1 ,496 gallons per inch OF
height The character Of the water being dis.
charged from the filter was such that small
| objects at the bottom of the basin could be
| plainly seen through twenty feet of water; and
at the close Of the test the bottom was plainly
seen by moonlight.
thirteen feet high. Az the opening of the test
ten filters were put in service, but after half
an hour one filter was cut out and nine were
used (the water in the basin gaining on the
| pumps): then nine filters were used for nine
end half hours; then the twelve filters were
| put in and run for seven and half hours, and
| eleven for the closing half hour, making an
| average of eleven filters in use throughout the
| twelve hours. The result obtained shows that
the filters. in the present condition Of the
gallons gallon a'H IN twenty four hours A.'' -'''''
tabulaied statement Of each hours work is
| attached to the report uncer the following
ing of engine counter, revolutions of engine,
| gallons of water pumped, equivalent to mum.
| Der Of gallons in twenty.four hours, number of
| filters In use. The footing Of these columns
| gives the following:
Gallons.
| Water at close of test three inches
higher than at opening. 4,4sS
Water pumped. ..............."..... !, 1927, ,S4S
not In use ...........'............... 175,665
| Result in - hours 2l0S, ,O02
Capacity of 12 filters in "a hours. .. 4,216,00i
r. NJ. CLAYTON, City Engineer.
| C. B. HAYNES, Assistant CftS Engineer.
WIN. q. RICHARDS Supt. Water Works